pipeline {
    agent { ... }

    tools { dockerTool 'docker' }

    stages {
        stage('test'){
            steps {
                script {
                    sh '''
                        : "PATH=$PATH"
                        which docker || true
                        docker --version || true
                    '''

                    docker.withRegistry('http://nexus.local:5000', 'nexus'){
                        sh ': "PATH=$PATH"'

                        //docker.image('...').push()
                    }
                }
            }
        }
    }
}

Unpacking https://download.docker.com/linux/static/stable/x86_64/docker-28.3.3.tgz to /home/user/tools/org.jenkinsci.plugins.docker.commons.tools.DockerTool/docker on minimal-0044l59lofet8 on jenkins-agent0.env.geomotiv.com
.....
[Pipeline] sh
+ : PATH=/home/user/tools/org.jenkinsci.plugins.docker.commons.tools.DockerTool/docker/bin:/home/user/tools/org.jenkinsci.plugins.docker.commons.tools.DockerTool/docker/bin:/opt/java/openjdk/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+ which docker
/home/user/tools/org.jenkinsci.plugins.docker.commons.tools.DockerTool/docker/bin/docker
+ docker --version
Docker version 28.3.3, build 980b856
.....
[Pipeline] withDockerRegistry
$ docker login -u jenkins -p ******** http://nexus.local:5000
[Pipeline] // withDockerRegistry
.....
[Pipeline] End of Pipeline
java.io.IOException: error=2, No such file or directory
.....
Also:   org.jenkinsci.plugins.workflow.actions.ErrorAction$ErrorId: d905b84a-21ca-4322-bfbb-19fa05e5f7be
Caused: java.io.IOException: Cannot run program "docker": error=2, No such file or directory
Finished: FAILURE